Rock salt, which is deposited in the earth 200 million years ago, it contains more than 84 minerals that are found in the human body it is also called as Vastu lamp because of its various benefits. How Himalayan Salt Lamps Works? Salt is hygroscopic in nature which attracts moisture. When a salt lamp is heated, moisture on the surface of a salt evaporates and releases negative ions these negative ions react with the dust and other particles presence in the room and settle down on floor which naturally clean air in the room. After some days aura of that place changes due to elementary waves and light rays come from Himalayan rock salt lamp, in order to facilitate this small bulb is placed inside salt lamp. You can put few drops of essential oil or non alcoholic based perfume on top of lamp and it work as a room freshener. Care of Lamps It is recommended that the lamp be lighted every day to get the benefits. If you are not using the lamp for a longer period of time, then cover it properly in a plastic bag, put back in the box and keep in dry place. It is recommended to keep the lamp in cover in rainy season. You can clean the lamp with cloth when it is off. There may be a slight variation in the shape, size and color of original product than the image shown here, as it is a natural hand crafted product. STORAGE: it is recommended to after use store in a dry place cover it in airtight plastic bag to avoid dissolving by coming in contact with moisture or water.